html {
  position: relative;
}
html .again {
  position: absolute;
  right: 50%;
  margin-right: -25px;
  top: 80px;
}
html .wrapper {
  display: table;
  position: absolute;
  right: 50%;
  margin-top: 120px;
  margin-right: -220px;
  width: 440px;
  height: 440px;
  border: 3px solid #585b5e;
}
html .wrapper .hang {
  position: relative;
}
html .wrapper .hang .kuai,
html .wrapper .hang .bombbox {
  display: table-cell;
  border: 1px solid black;
  width: 22px;
  height: 22px;
  background-color: #c3c3c3;
  background-image: url("../source/kuai.png");
  background-image: 100%;
}